// Copyright 2023 Greptime Team
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

pub use datafusion_common::ScalarValue;

pub use crate::columnar_value::ColumnarValue;
pub use crate::signature::{Signature, TypeSignature, Volatility};

/// Default timestamp column name for Prometheus metrics.
pub const GREPTIME_TIMESTAMP: &str = "greptime_timestamp";
/// Default value column name for Prometheus metrics.
pub const GREPTIME_VALUE: &str = "greptime_value";
/// Default counter column name for OTLP metrics.
pub const GREPTIME_COUNT: &str = "greptime_count";
/// Default physical table name
pub const GREPTIME_PHYSICAL_TABLE: &str = "greptime_physical_table";
